Roller spun metal manufacture



Oct. 20, 1931. w. R. HARRISON 1,828,464

ROLLER SPUN METAL MANUFACTURE Filed May 19. 1928 4 Sheets-Sheet 1 ed May 19, 1928 w. R. HARRISON 4 Sheets-Sheet 2 WWW" w- I I l' n! "lp" gwwwtoz wrjsozz Oct. 20, 1931. w. R. HARRISON 1,828,464

ROLLER SPUN METAL MANUFACTURE Filed May 19, 1928 4 Sheets-Sheet 5 gnwnto'a W19. [far/"129m Oct. 20, 1931. w. R. HARRISON ROLLER SPUNMETAL MANUFACTURE Filed May 19, 1928 4 Sheets-Sheet 4 gwvz'nfo'a Wi /7 Y 12:01

athaz m1 Patented Oct. 20, 1931 UNITED STATES PATENT OFFICE WILLIAM R. HARRISON, OF MASSILLON, OHIO, ASSIGNOR TO THE SPUN STEEL CORPORA- TION', OF CANTON, OHIO, A CORPORATION OF OHIO ROLLER SPUN METAL MAFI'UFAGTURE Application filed May 19,

My invention relates to methods and apparatus for roller spinning in the manufacture from blank or partially formed disks of sheet or strip metal, articles including a Wheel disk and one or more relatively narrow and relatively deep annular grooved flanges integral with the wheel disk, such as V pulleys and the like, and more particularly to improvements in the methods and m apparatus set forth in the prior application of Reynold G. Nelson, for patent for improvements in spun metal manufacture and products, filed September 16, 1926, Serial No. 135,852, matured August 7, 1928, in'Patent In the said prior application, apparatus is set forth for carrying out the method set forth therein of roller spinning V grooved pulleys as aforesaid, preferably from the heavier gauges, as 16 gauge and thicker and including quarter inch thick sheets or strips, not only of the soft metal such as brass, aluminum, or the like, but also of steel, the roller spun metal V grooved pulleys thus 2 made being completely finished, and substantially dynamically balanced.

The method of roller spinning set forth in the said prior application includes rotat- I ing material to be spun, applying radial pressure to the rotating-material, and applying an axially directed thrust to the rotating material during the application of the radial pressure.

The apparatus for carrying out this method set forth in the said prior application includes yielding means for applying the axially directed thrust preferably including an air cylinder or the like and a cooperating piston, but the means for applying the radial pressure to the rotating material consists of a manually operated cross feed screw.

Consequently the applied radial pressure is unyielding, and is not uniform in its application, due to the impossibility of attaining uniform manual operation of the cross feed screw, with resulting imperfections in the formations of a certain proportion of 60 the pulleys made.

. supported by suitable legs 12and 12'.

1928. Serial No. 279,029.

A further important difiiculty of the method and apparatus set forth in the said prior application, arises from the fact that by reason of the manually operated cross feed screw for applying the radial pressure, a great deal of time is lost in moving the spinning tool to and from the work, because of the heavy physical exertion required.

Accordingly the objects of the present improvements include the provision of an improved and more rapid method and apparatus for applying the radial pressure, and improvements in the general and detail ar- 'rangements of the several parts of the apparatus together with improvements in their 5 mode 0 operation, all as will hereinafter be set forth in detail and claimed.

In general terms the improved method hereof may be stated as including applying a yielding thrust upon the outer ends and one surface of the annular flange of a partial-. ly formed pulley or the like, and simultaneously applying a yielding thrust uponthe other surface. thereof, and intermediate the I ends.

Preferred and improved apparatus for carrying out the improved process is illustrated in the accompanying drawings forming part hereof, in which Figure 1 is a top plan view, with portions broken away and portions in section, of a preferred embodiment of the improved apparatus;

Fig. 2, a fragmentary view similar to Fig. 1 illustrating parts of the apparatus in another position;

Fig. 3, affront elevation thereof;

Fig. 4, a fragmentary view with portions in section and distant parts removed, illustrating one step in the use of the apparatus in carrying out the improved process hereof;

Fig. 5, a similar view illustrating a later step; and

Fig. 6, an enlarged View similar to Figs. 4 and 5 illustrating a final step.

Similar numerals refer to similar parts throughout the several views.

y The improved roller spinning apparatus indicated generally at 10 includes a bed 11 stock by rotation of a longitudinal feed carriage control wheel 16.

An improved cross feed carriage 17 mounted upon the longitudinal feed carriage for cross movement by operation of improved control means as will hereinafter be set forth in detail.

For resisting both thrust and radial loads, the headstock 13 is provided at its ends with ball or roller bearings 18 and 18, and a spindle drive shaft 19 is journalled in the spaced bearings 18 and 18 and has secured thereon between the bearings a drive pulley 20 for operative connection, as by a belt, not shown, with a power shaft.

At the spinning end 21 of the headstock, the spindle shaft mounts a spinning-die head 22, the die head being located between the bearing 18, and the tailstock 14.

The die'head 22 preferably includes axial with the shaft 19, a cylindric sleeve bearing 23 preferably having an outwardly extending stop flange 24 adjacent the headstock, and a spinning die sleeve 25 is slidably mounted on the sleeve bearing 23, and is provided with an annular groove 26 for receiving a finger, not shown, for sliding the sleeve upon the sleeve bearing for purposes which will hereinafter be set forth.

For clamping material to be spun against the outer end of the die head 22, and for applying a preferably yielding axially directed thrust upon the material during the roller spinning operations the improved tailstock 14 has secured thereon an outwardly extending bearing sleeve 27, the aperture in which is coaxial with the spindle shaft and die head, and in which a piston rod 28 is slidably mounted.

The piston rod 28'is provided at its outer end with a double-acting piston 29, opera: tively mounted in a cylinder 30 for yielding actuation in the usual manner by means of a compressible medium as air 'and the like admitted to the cylinder through a supply line 31 having a two way control valve 32 therein, and connected with opposite endsof the cylin der by suitable pipes 33 and 33', whereby air may be selectivel admitted to the cylinder at either side of t e piston to move the piston rod longitudinally towards or away from the spinning die head.

Upon its end adjacent the headstock, the piston rod 28 has mounted thereon; a thrust and pressure spinning die head 34 preferably mounted upon the rod by means of a bearing 35 of a ball or roller type adapted for receiving radial and thrust loads.

The spinning die head 22 on the spindle shaft 19 is preferably provided with a pilot pin 36 axial therewith and having a tapered end removably secured in a suitable aperture in the outer end of the head 22, and the pin extends outwardly therefrom for mounting the hubs of the pulleys to be spun and for guiding entrance into an axial aperture 37 in the thrust and spinning die head 34 upon the piston rod 28.

The improved cross feed carriage 17 includes a tool holder 38 secured thereon; and a roughing roller 39 is mounted on a shaft 40 iournalled in suitable bearings on the tool older at one side of the spindle shaft 19, and a finishing roller41 is mounted on a shaft 42 journalled in suitable bearings on the tool holder at the other side of the spindle shaft 19.

The cross feed carriage 17 is arranged to be moved transversely of the spindle shaft 19 on suitable guides 43 on the longitudinal feed carriage 15 as by means of a transversely ext-ending piston rod 44 secured at one end to the cross feed carriage 17 and at the other end to a double-acting piston 45 operatively mounted in a cylinder 46 for yielding actuation in the usual manner by means of a compressible gaseous medium as air and the like admitted to the cylinder through a supply line 47 having a two way control valve 48 therein connected with opposite ends of the cylinder by suitable pipes 49 and 49', whereby air may be selectively admitted to the cylinder at either side of the piston to move the piston rod transversely towards or away from the die heads.

For automatically maintaining the rollers 39 and 41 equal distances from the-axis of the die heads, when air is not being directed against either side of the piston 45, that is during the setting up and stripping operations for the machine, an auxiliary transverse cylinder 50 having a communication with the cylinder 46 is provided preferably coaxial than the piston 45 is operatively mounted in the cylinder 50, and provided with an auxiliary piston rod52 extending into the cylinder 46 so that its end in the cylinder 46 may abut with the adjacent end of the piston 45.

A pipe 53 connected directly between the air supply line 47 and the outer end of the cylinder 50 maintains a constant pressure on the smaller piston 51 sufficient to return the piston 45 to the neutral position illustrated in Fig. 1 after the air supply has been shut off first from the pipe 49 and then from the pipe 49' communicating with the end of the cylinder 46 at the outer side of theyp'iston 45, whichis the side against which the piston rod 52 applies its thrust.

, dynamically balancing. a pulley or the like,

illuring a continuous rotation of the spinning ead. I

A partially formed annular tubular pulley 60 including a wheel disk 61 and an annular flange 62 extending laterally therefrom may be formed from sheet or strip metalpreferably of 16 gauge or thicker, either by draw pressing operations, or'by spinning,. as set forth in the aforesaid prior application of Reynold G. Nelson, Serial No. 135,852, matured August-7, 1928, in Patent No. 1,680,061.

The partially formed pulley 60 is prefer ably secured as by means of rivets 63- to a hub 64, the aperture of which is coaxial with the 'annular flange 62, and slidably fits upon the pilot pin 36.-

Accordingly, as illustrated in Fig. 4, a partially formed pulley 60 is mounted upon the spinning head 22, by sliding its hub 64 upon the pilot pin 36.

The spinning head 22 is then continuously rotated preferably at a speed of 1500-1800 R. P. M. The thrust and spinning head 34 is then actuated by the valve 32 to apply a yielding axial pressure, first upon the outer ends of the flange 62 interposed between the heads 22 and 34.

Simultaneously the valve 48 is operated, first to apply the yielding rolling pressure of the roughing roller 39 upon-the outer surface of the flange 62.

In Fig. 5 the roughing roller 39 which has a wedge shaped outer periphery with a relatively blunt and curved apex for the wedge, has been thus advanced a sufficient distance to simultaneously apply a yielding pressure upon the outer surface of the flange 62 at the same time the suitably formed outer surfaces of the spinning head 22 is applying a nonyielding pressure against portions of the inner surface of the flange 62, and the suitably formed outer surfaces of the thrust and spinning head 34 is applying a yielding pressure against other portions of the inner surfaceof the flange 62 through the disk 61.

The valve 48 is then operated to reverse the admission of air into the cylinder 46 so that the finishing roll 41, which'has an outer peripherycorresponding to the desired inner cross section of the finished pulley, is advanced to apply a yielding rolling pressure upon the outer surface ofthe flange 62, in-

terposed as aforesaid between the non-yielding pressure of the spinning head 22 and the yielding pressure of the spinning head 34,

whereby as illustrated in Fig. 6 the desired V pulley is finished,formed and dynamically balanced by the aforesaid roller spinning operations, during a continuous rotation of the spinning head 22.

The finished pulley may have formedaround its periphery a narrow and-relatively deep groove having intersecting frusto-conical side walls, as shown in Fig. 6.

The application of the yielding radial pressure by the improved control means as aforesaid, very greatly increases the production capacity of each machine, and the combined application of the yielding axial and radial pressures provides a superior product with a substantial decrease in the who of the number of pulleys spoiled'in processing to the total number of pulleys processed.

I claim:

1. Roller spinning ap aratus including a rotatable spinning head means .for rotating the head, a t'ailstock'cylinder, a doubleacting piston operatively mounted in the cylinder, a piston rod extending from said piston toward said spinning head,.a rotatable pressure spinning head mounted on said piston rod adapted to cooperate with said first mentioned head to clamp material to be worked therebetween and to press the clamped material toward said first mentioned head, a second cylinder, a double-acting piston operatively mounted in said second cylinder, a piston rod extending from said second cylinder generally in a direction towardsaid spinning heads, a pressure spinning roller rotatably mounted on said second cylinder piston rod movable in a-direction angular with respect to the axis of rotation of said spinning heads, compressible means for operating said pistons for applying a yielding pressure between said spinning heads and for applying a yielding pressure to said pressure roller against the yieldingly pressed spinning heads, and valves for admitting the compressible medium to said cylinders adapted to regulate the volume of compressible medium admitted and to vary'the direction in which the compressible medium is rendered effective on the double-acting pistons.

2. Roller spinning apparatus including a rotatable spinning head, means for rotating the head,a tailstock cylinder, a double-acting piston operatively mounted in the jcy'linton rod extending from said second cylinder generally in a direction toward said spinning heads, two pressure spinning rollers rotatably mounted on said second cylinder piston rod movable in a direction angular with respect to the axis of rotation of said spinning heads and interconnected with each other in such a manner that upon movement of said second piston rod in either direction to render one of the spinning rollers cooperative with the spinning heads the other roller is moved to inoperative position, and compressible means for operating said pistons for applying a yielding pressure between said spinning heads and for applying a yielding pressure alternately to said two pressure rollers against the yieldingly pressed spinning heads.

3. Roller spinning apparatus including a rotatable spinning head, means for rotating the head, a tailstock cylinder, a double-acting piston operatively mounted in the cylinder, a piston rod extending from said piston toward said spinning head, a rotatable pressure spinning head mounted on said piston rod adapted to cooperate with said first men tioned head to clamp material to be worked therebetween and to press the clamped material toward said first mcntioned head, a second cylinder, a double acting piston operatively mounted in said second cylinder, 2. piston rod extending from said second cylinder generally in a direction toward said spinning heads, two pressure spinning rollers 'rotatably mounted on said second cylinder piston rod movable in a direction angular with respect to the axis of rotation of said spinning heads and interconnected with each other in such a manner that upon movement of said second piston rod in either direction to render one of the spinning rollers cooperative with the spinning heads the other roller is moved to inoperative position, conipressible means for operating said pistons for applying a yielding pressure between said spinning heads and for applying a yielding pressure alternately to said two pressure rollers against the yieldingly pressed spinning heads, and auxiliary means actuating said second piston to move both spinning rollers to inoperative position when the sup-- ply of compressible medium to operate said second piston is cut oil.

4. The method of roller spinning an annular tubular member of sheet or strip metal or the like to form a narrow and relatively deep groove in the tubular member, Which'includes rotating the tubular member on its axis, applying pressure upon the ends of the tubular member, and at the same time applying'through a compressible gaseous medium a yielding rolling pressure on the outside of the tubular member between the ends thereof and at an angle to the direction of-application of the end pressure.

5. The method of roller spinningan annular tubular member of'sheet/ or strip metal or the like to form a narrow and relatively deep groove in the tubular member, which includes rotating the tubular member on its lar tubular member of sheet or strip metal or the liketo form a narrow and relatively deep groove having intersecting frusto-conical side walls, which includes simultaneously applying through a compressible gaseous medium, yielding pressures upon the opposite sides of the frusto-conical side Walls of the groove, the pressures being'rolling pressures on the inner or groove sides of the walls and abutting pressures on the outer sides thereof.

7. The method of roller spinning an annular tubular member of sheet or strip metal or the like to form a narrow and relatively deep groove in the tubular member, which includes rotating the tubular member on its axis, aplying yielding pressure through a compressible gaseous medium upon the ends of the tubular member, and at the same time applying through a compressible gaseous medium a yielding rolling pressure on the outside of the tubular member between the ends thereof and at an angle to the direction of application of the end pressure.

8. Roller spinning apparatus including means for rotating a tubular member of sheet or strip material, a frusto-conical forming head for each end portion of the tubular member, axially directed thrust means for moving one of the forming heads toward the other, a spinning roller radially operable toward and from the interval between the forming heads, and means includin a compressible gaseous actuating medium or moving the spinning roller with a yielding radial pressure against the outside of the rotating tubular member between the ends thereof during the application ofthe axial thrust.

9. Roller spinning apparatus including means for rotating a tubular member of sheet or strip material, a frusto-conical forming head for each end portion of the tubular member, axially directed thrust means including a compressible gaseous medium for moving one of the forming heads with a yielding axial pressure toward the other, a spinning roller radially operable toward and from the interval between the forming heads, and means including a compressible gaseous actuating medium for moving the spinning roller witha yielding radial pressure against ,.the outside of the rotating tubular member In testimony that I claim the above, I have hereunto subscribed my name. 

